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Home >> Plymouth >> 2001 >> Prowler >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Heated Glass/Defoggers >> Rear Defogger >> Heated Systems - Rear Defogger >> HVAC Control Module >> Diagnosis And Testing - HVAC Control Module >> Testing Without The DRBIII(R) Scan Tool
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Testing Without The DRBIII(R) Scan Tool

  1. Remove the control switch from console and do not disconnect control switch.
  2. Using a ohmmeter, check leads between Pins 5 and 8 of the 8-way connector. See Fig 1 . Depress the rear window defogger button. Resistance reading should be 500 to 520 ohms. If not OK, replace HVAC. If OK, check the following:
    • Rear window relay (EBL)
    • Blown fuse
    • Cut wire
    • Poor ground
    • Poor connection
    • Defective BCM
    • Bulkhead connector inoperative
    Fig 1: HVAC Control Module Connectors
    G03151144Courtesy of CHRYSLER CORP.
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